From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936368AbZDJGRk (ORCPT ); Fri, 10 Apr 2009 02:17:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763678AbZDJGQn (ORCPT ); Fri, 10 Apr 2009 02:16:43 -0400 Received: from mga14.intel.com ([143.182.124.37]:28520 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1765558AbZDJGQn (ORCPT ); Fri, 10 Apr 2009 02:16:43 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.40,165,1239001200"; d="scan'208";a="130013460" Message-Id: <20090410061254.240509394@intel.com> References: <20090410060957.442203404@intel.com> User-Agent: quilt/0.46-1 Date: Fri, 10 Apr 2009 14:10:01 +0800 From: Wu Fengguang To: Andrew Morton Cc: LKML , Wu Fengguang Cc: Ying Han Subject: [PATCH 4/9] readahead: increase interleaved readahead size Content-Disposition: inline; filename=readahead-interleaved-size.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make sure interleaved readahead size is larger than request size. This also makes readahead window grow up more quickly. Reported-by: Xu Chenfeng Signed-off-by: Wu Fengguang --- mm/readahead.c | 1 + 1 file changed, 1 insertion(+) --- mm.orig/mm/readahead.c +++ mm/mm/readahead.c @@ -403,6 +403,7 @@ ondemand_readahead(struct address_space ra->start = start; ra->size = start - offset; /* old async_size */ + ra->size += req_size; ra->size = get_next_ra_size(ra, max); ra->async_size = ra->size; goto readit; --